<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="../vue.js"></script>
</head>

<body>
    <div id="app">
        {{formatterSex1()}}
    </div>
</body>
<script>
    new Vue({
        el: '#app',
        data: {
            sex: 99
        },
        methods: {
            formatterSex1() {
                if (this.sex === 0) {
                    return '女'
                } else if (this.sex === 1) {
                    return '男'
                } else {
                    return '未知'
                }
            }
        },
        computed: {
            formatterSex: function() {
                if (this.sex === 0) {
                    return '女'
                } else if (this.sex === 1) {
                    return '男'
                } else {
                    return '未知'
                }
            }
        }
    })
</script>

</html>